HP 83522A Service Notes page 144

5-27A. MARKER GAIN ADJUSTMENT (Fine Tune) (UPDATES) (Cont'd)
3312A FUNCTION GENERATOR
SINEWAVE
....................................................
ON
AMPLITUDE
...............................................
10
V
P-P
FREQUENCY
.................................................
5Hz
8755C SWEPT AMPLITUDE ANALYZER
DB/DIV
.......................................................
5dB
REFERENCE LEVEL
..........................................
- 2 dB
VERNIER
.....................................................
OW
PROCEDURE:
3. On the HP 8755C, observe the 1 dB markers riding on a varying power level. Press CF f to
step through the band (10 MHz-2.0 GHz). If the markers seem-weak, ragged, or start
flashing between markers (see Figure 5-38b), adjust gain (A8R53). However, be aware that
these adjustments can create double markers or degradation of off pulses. (1 MHz markers
are only specified to 1 GHz CF, ie., correctly adjusted, they may start disappearing or
having double markers beyond 1 GHz).
4. Iterate Step 3 for 10 MHz markers with CF= 60 MHz, CF STEP SIZE= 100 MHz, AF= 100
MHz and the gain adjustment of ABR54.
5. Reiterate Step 3 for 50 MHz markers with CF=260 MHz, CF STEP SIZE= 500 MHz,
AF= 500 MHz and the gain adjustment of A8R55.
HP 8755C Display
of 1 MHz MKR's
Figure 5-38b. Markers incorrectly
adiusted
Figure 5-38c. Markers correctly
adjusted
UPDATES APPLY TO ALL SERIALS
UPDATES